Grok.com: "What is the best website for metal finishing questions and answers?"

finishing.com -- The Home Page of the Finishing Industry

-----

Problem in tin plating

We are using Ni as barrier between Brass and Tin. At the time of wave soldering of this part on PCB, its tin plating is removed. that is not acceptable. please suggest the solution.
For the wave soldering preheat temp. is 300 °C and solder temp. is 250 C.

Rahul Sharma
buyer - Udaipur, Rajasthan, India
October 17, 2008

Rahul,
Because of the higher temperatures used in lead free soldering, an adjustment has to be made in the flux. I remember we had to increase the rosin content and lower the solvent content. This was accomplished by our supplier of solder/flux. A thicker tin deposit and a longer dwell time in the pre-heat will help too. Are you sure the pre-heat temp is that high? I hope this helps you.

Mark Baker
Process Engineer - Syracuse, New York
October 23, 2008

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: